How to tell if iOS and Mac apps are eligible for Family Sharing

Family Sharing allows you and the other members of your household to share iTunes, App Store, and iBooks purchases across all your devices, without having to purchase them multiple times. While most app developers support Family Sharing, Apple gives them the option to opt out if they choose. Luckily, there's an easy way to find out if specific apps are eligible for Family Sharing. Here's how!